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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - The Simulations of the Effect of the External Field in the Joule Balance
摘要： Due to the movement of the main magnet, the effect of the external field is a critical problem in the joule balance. The FEM simulations of the external field both in the electromagnet system and permanent magnet system are performed in this paper. The results show that although the error caused by the external field is much smaller in the permanent magnet system than that in the electromagnet system, it still needs to be further reduced. More efficient solutions should be considered to eliminate the effect of the external field when the permanent magnet system is used.
关键词： external field,FEM simulation,Kibble balance,joule balance,the Planck constant
更新于2025-09-10 09:29:36
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Accurate and efficient analysis of the upward heat flow in InGaP/GaAs HBTs through an automated FEM-based tool and Design of Experiments
摘要： This paper presents an extensive analysis aimed at quantifying the impact of all the key technology parameters on the upward heat flow in state‐of‐the‐art InGaP/GaAs heterojunction bipolar transistors (HBTs) for various emitter areas and shapes. Extremely accurate thermal simulations are conducted in a relatively short time with a tool relying on a commercial 3‐D finite‐element method (FEM) solver and an in‐house routine for automated geometry construction, optimized mesh generation, sequential solution, and data storing/processing. Design of Experiments is used to define a thermal resistance model as a function of the aforementioned parameters on the basis of a few FEM data.
关键词： finite‐element method (FEM),gallium arsenide (GaAs),Design of Experiments (DOE),thermal simulation,thermal resistance,heterojunction bipolar transistor (HBT)
更新于2025-09-04 15:30:14
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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore, India (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Differential Pressure Sensor Using Silicon on Insulator Back to Back Cantilever Structure
摘要： In our day to day life differential pressure sensor can be used in much application. This type of pressure sensors are used for measuring the difference between two different pressure levels. Mostly bulk micro machined fabrication tool is used for fabrication process. Hence these type sensors have low cost and reliable than normal conventional sensor. This sensor is designed mainly to compare both the pressure below and above the liquid and flow rates and measures changes in pressure across restriction. The output differential pressure sensor varies with respect to the change in pressure level at up (or) down cantilever beam. When the pressure value at bottom side is high, when the membrane deflect towards forward direction (i.e.) moves upward. when the pressure value at which the bottom side is lower than the membrane deflects to backward direction (moves downward). This design is mainly used in domestic and industrial application.
关键词： Agriculture Applications,MEMS,Humidity Sensor,Temperature Sensor,Finite Element Method (FEM),micro-Cantilever
更新于2025-09-04 15:30:14
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[IEEE NAECON 2018 - IEEE National Aerospace and Electronics Conference - Dayton, OH, USA (2018.7.23-2018.7.26)] NAECON 2018 - IEEE National Aerospace and Electronics Conference - Indium Tin Oxide/Barium Strontium Titanate THz Sensor Antenna
摘要： A Bow-Tie ITO/BST and Au/BST antennas were designed and analyzed using the finite element, Multiphysics COMSOLTM program. The study shows that the outputs peak at several modes and ITO antennas allow for the integration of the antenna with optoelectronic devices.
关键词： COMSOL FEM Modelling,THz,Nano-Antenna
更新于2025-09-04 15:30:14
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Effect of elastomer characteristics on fiber optic force sensing performance in biomedical robotics applications
摘要： Miniaturized and “smart” sensors are required for research in biology, physiology, and biomechanics, and they have extremely important clinical applications for diagnostics and minimally invasive surgery. Fiber optic sensors have been proven to provide advantages compared to conventional sensors and high potential for biomechanical and biomedical applications. They are small, easy to operate, minimally invasive with low risk, more accurate, and inexpensive. This paper reports the design and modeling of a fiber optic force sensor that is capable of measuring compliance for a contact force of up to 1 N. The main objective of this study is to design and model a fiber optic sensor capable of measuring the total force applied on an object. A polydimethylsiloxane (PDMS) elastomer film with a thickness of 1.2 mm is placed between an optical fiber tip and an object, and it is used for measuring the force applied on a rigid element. The compliance of the fiber optic force sensor is measured by recording the response of PDMS elastomer films under different load conditions. We use finite element modeling results as a basis for comparing experimental data. The agreement between theoretical predictions and experimental data is reasonable and within an acceptable range.
关键词： Force sensor,FEM analysis,Optical fiber,Elastomer,MATLAB analysis,LabVIEW,ANSYS simulation,Biomedical robotics
更新于2025-09-04 15:30:14